If you need a free utility that makes cleaning out your Windows machine and simple straight forward task, C-Cleaner should be at the top of your list. ItThis lightweight and fast Windows registry cleaner is updated for Windows 7 and makes it a snap to clean away unused, obselete, or inconsistent entries. C-Cleaner makes a backup before any changes are made, to keep you from doing too much damage, and you can run it from a thumdrive on any machine you want. Super useful!